Harrow.



0. E. PORKNER.

HARROW.

APPLICATION FILED MAR. 11, 1913.

Patented July 8, 1913.

Inventor Attorneys onrrn CHARLES E. FORKNER, OF MARSHALLTOWN, IOWA.

HARROW.

Specification of Letters Patent.

Patented J nly 8, 1913.

Application filed March 11, 1913. Serial No. 753,605.

To all whom it may concern Be it known that I, CHARLES E. Fonknnn, acitizen of the United States. residing at hlarshalltmvn, in the countyof Marshall and State of Iowa, have invented a new and useful Harrow, ofwhich the following is a specification.

This invention relates to spring tooth harrmvs and more particularly tomeans whereby the teeth can be securely fastened to the frame of theharrow without danger of lateral displacement relative to each other,means being provided whereby the attaching bolts are relieved ofexcessive strains and thus rendered more ellicient.

WVith the foregoing and other objects in View which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembm liment of the invention herein disclosed, can be made within thescope of what is claimed, without departing from the spirit of theinvention.

In the accompanying drawings the preferred form of the invention hasbeen shown.

In said drawings :-Figure 1 is a plan view of a harrow embodying thepresent ilnproven'ients. Fig. 2 is a side elevation thereof. Fig. 3 is aperspective view of one of the teeth. Fig. t is an elevation of aportion of one of the members of the harrow frame. Fig. 5 is a sectionon line i\-l3 Fig. 4.

Referring to the figures by characters of reference 1 designatestranwersely extending angle strips arranged with their llanges extendingdownwardly and these angle strips are connected in any preferred manner,as by means of channeled strips 2 resting thereon and secured thereto.Fur-then more diagonally disposed braces 23 may be secured upon thestrips 1 and one or more additional connecting strips t may be securedon the strips 1. The depending flanges of the strips 1 are formed withslots 5, the slots in each flange being disposed in alinernent and closeto the top of the strip and the slots in all of the strips being spacedapart equal distances so that the corres 'ionch ing slots in the severalstrips will register. These slots are designed to receive the shanks (iof spring teeth 7, the shanks being so proportioned as to fit snuglywithin the slots.

In arranging the teeth, where three cross strips 1 are employed, saidteeth are disposed in two transversely extending series. The shanks ofthe teeth constituting the rear series are extended through alternateslots 5 in the llange of the rcarmost strip 1 and thence into thecorresponding slots in the flange of the middle strip 1. liolts or otherfastening devices, indicated at 8. are inserted through the top of themiddle strip 1. and into openings 9 formed in the front end portions ofthe shanks (5. Thus it will be seen that the teeth of the rear serieswill be securely held and lateral displacement thereof will be preventedby the end walls of the slots 5 in which the shanks (3 are seated. Theteeth of the second or front series are secured to the harrow byinserting their shanks (i into those slots in the middle strip 1 whichare located between the shanks of the rear series of teeth. Said shanksof the front series are then extended forwardly into the slots in thefront strip 1 and are seem-ed by means of bolts or the like cXteI'ulinginto openings in the front ends of the shanks. Thus it will be seen thatall of the barrow teeth will be securely held and will be maintainedconstantly in the same relation to each other. Should one of the teethbreak or become worn, thus necessitating the insertion of a new one, thebolt or other fastening device 8 can be removed and the shank thuswithdrawn from the slot and a new one quickly substituted, thisoperation bcing effected easily and without requiring the services of askilled mechanic.

It is to be understoml that all of the strips 11. are similarly slottedso that, if desired, all of the harrow teeth can be placed in a rowinstead of staggered as illustrated in the drawings.

\Vhat is claimed is:-

1. A harrow including angle strips having slotted depending flanges,connections between the strips, and spring teeth having flanges extendedthrough the slots of two adjoining strips.

2. A harrow including angle strips having slotted depending flanges.connections between the strips, spring teeth having flanges extendedthrough the slots of two adjoining strips, and means for securing eachshank to the top of that strip in which the end portion of the shank isseated.

3. A harroW including angle strips having slots therein, connectionsbetween the strips, and spring harroW teeth arranged in front and backseries, each tooth of one series being provided With a shank extend ingthrough a slot in the rear angle strip and thence into a slot in theangle strip next in front thereof, said shanks being arranged inalternate slots in each of said strips, and the shanks of the otherseries being extended through the remaining slots in the last namedstrip and thence through the corresponding slots in the front strip.

4. A harrow including angle strips having slots therein, connectionsbetween the strips, and spring harrow teeth arranged in front and backseries, each tooth of one series being provided with a shank extendingthrough a slot in the rear angle strip and thence into a slot in theangle strip next in front thereof, said shanks being arranged inalternate slots in each of said strips, the shanks of the other seriesbeing extended through the remaining slots in the last named strip andthence through the corresponding slots in the front strip, and means forconnecting the front end port-ion of each shank to the strip in whichsaid portion is seated.

5. A harrow including transversely extending fixedly connected anglestrips having slots in their depending flanges, front and rear series ofharroW teeth having shanks extending through certain of the slots in thestrips, and means for detachably connecting the front end portion ofeach tooth to the strip in which said portion is seated. V

6. A harrow including transversely extending fixedly connected anglestrips having depending slotted flanges, harrowteeth having shanksextending through c0rrespending slots in adjoining strips, and meansextending throu 'h the front end portions of the shanks and t irough thetops of the strips in which said portions are seated for detachablysecuring the shanks to the strips.

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signature in the presence of two witnesses.

CHARLES E. FORKNER.

WVitnesses BEN KELLEY, GUY VILLIAMS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

